Northwest Off-Road Specialties - Toyota 4x4 Truck Parts & AccessoriesToyota 4x4 Truck
NWOR Toyota 4x4 Performance Parts
Toyota Truck Parts and Accessories
36th Year Anniversary

"Dr. Diff®" Differential

Detroit Truetrac | Detroit Locker | Detroit Budget Lockers | Limited Slip
7-1/2" Differentials
| 8" Differentials | Tacoma Differentials
4cyl Ring & Pinions
| V6 Ring & Pinions | Lubricants

Dr Diff®
PRO BUILT® 8" COMPLETE DIFFERENTIAL ASSEMBLIES

Pro Built 8-inch Toyota Differentials

RECOMMENDED GEAR RATIO
TIRE DIAMETER
RATIO
29" to 30"
4.56
31" to 32"
4.88
33" to 36"
5.29
37" or larger
5.71

'79 - '85 Front    '79 - '95 Rear
4.11 Detroit Softlocker N63411
4.11 Detroit Truetrac N63611
4.37 Detroit Softlocker N63437
4.37 Detroit Truetrac N63637
4.56 Detroit Softlocker N63445
4.56 Detroit Truetrac N63645
4.88 Detroit Softlocker N63448
4.88 Detroit Truetrac N63648
5.29 Detroit Softlocker N63452
5.29 Detroit Truetrac N63652
5.71 Detroit Softlocker N63457

NWOR has received thousands of calls from customers needing increased horsepower, torque, and fuel economy from a ring and pinion change, but they were unable to complete the gear set-up themselves, or could not locate a reputable, experienced shop to perform the task.

NWOR offers completely assembled Toyota differential assemblies ready for you to install in your 4X4 with the confidence of owning a professionally assembled unitswith a great pride of workmanship.

"Doctor Diff" has been with NWOR since 1980 and has over 30 years of differential building experience. He's assembled over 2750 Toyota third members that are in use worldwide!

BUYER BEWARE!! Just because you see other Toyota differentials for sale by other "Ring & Pinion shops," things are not always as they seem. We consistantly receive units as cores that were set-up incorrectly, missing bolt-lock tabs, not torqued properly gouged carriers, cheap imported gears and, in some case, not all bearing were replaced!

All NWOR units are carefully disassembled, thoroughly inspected and cleaned. NWOR's high-quality ring and pinion gears are then blueprinted and new, heavy duty bearings are installed on the carrier of your choice (stock, Detroit Locker, or Detroit Truetrac). All units are assembled with precision to ensure exacting pinion depth and backlash. The differentials are adjusted to exacting NWOR specifications relative to engine horsepower and the demands of tire size to ensure a long service life in you truck! All units are on an exchange basis and shipped via UPS.

 
VEHICLES WITH V-6 OR ABS BRAKES
PLEASE CALL FOR ADDITIONAL INFORMATION FROM
OUR SERVICE DEPARTMENT

Dr Diff®
7-1/2" COMPLETE DIFFERENTIAL ASSEMBLIES

Dr. Diff Toyota 7 1/2 inch 4x4 Truck Differentials
Due to increasing demand NWOR stocks complete 1986-1995 IFS front axle differential assemblies ready to install in your late model truck or 4Runner. For trucks equipped with the new "shift on the fly" front axle, please call for information.

'86 - '95 IFS FRONT AXLE
4.11 Detroit Truetrac N64611
4.88 Detroit Truetrac N64648
4.37 Detroit Truetrac N64637
5.29 Detroit Truetrac N64652
4.56 Detroit Truetrac N64645
5.71 Detroit Truetrac N64657

Bill Quitmeyer Running His Toyota 4x4 And Dr. Diff Differential
Bill Quitmeyer of Q Squared Racing competes to win! Bill's flying machine runs on NWOR Dr. DIFF custom-built front and rear differential assemblies to stay in front of the competition.


Detroit Truetrac | Detroit Locker | Detroit Budget Lockers | Limited Slip
7-1/2" Differentials
| 8" Differentials | Tacoma Differentials
4cyl Ring & Pinions
| V6 Ring & Pinions | Lubricants
 



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